Paste JSON
Drop the raw JSON into the input panel.
Code & Data Tool
JSON Formatter
Clean, validate, repair, inspect, and export JSON.
Loading workspace...
About this tool
What is JSON Formatter?
JSON Formatter cleans up raw or minified JSON so it is readable. Paste your data and it validates it, repairs common mistakes where it can, and outputs indented JSON. You can choose the indentation and sort object keys alphabetically, then copy or export the result.
Useful when you need to
- Read a minified API response
- Tidy a config file before committing it
- Check a JSON assignment file for syntax errors
How to use
How to use JSON Formatter
01 02 Choose options
Pick the indentation size and decide whether to sort object keys.
03 Format
Run Format and read the output. Any syntax problem is reported.
04 Copy or export
Copy the formatted JSON or download it.
Tips
Get better results
- Sorting keys changes the order of properties, which is harmless for JSON objects but may matter if you diff against an older file.
- If repair changes your data, compare it with the original before using it.
FAQ
Frequently asked questions
Is my JSON uploaded?
No. Formatting happens in your browser.
Why does it say my JSON is invalid?
Common causes are trailing commas, single quotes around strings and unquoted keys.
Does formatting change the data?
No. Only whitespace changes, apart from key order if you choose to sort.
More practical guides · File handling and privacy · Report an incorrect instruction